package com.htpay.util;

import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * IP地址
 */
@Component
public class IPUtils {
    private static Logger logger = LoggerFactory.getLogger(IPUtils.class);

    /**
     * 配置的端口
     */
    private static String port;

    /**
     * 配置的服务器context
     */
    private static String contextPath;

    /**
     * 获取服务器配置的domain
     *
     * @param port
     */
    private static String domain;

    @Value("${server.port}")
    public void setPort(String port) {
        IPUtils.port = port;
    }

    @Value("${server.servlet.context-path}")
    public void setContextPath(String contextPath) {
        IPUtils.contextPath = contextPath;
    }

    @Value("${server_domain}")
    public void setDomain(String domain) {
        IPUtils.domain = domain;
    }

    /**
     * 获取IP地址
     * <p>
     * 使用Nginx等反向代理软件， 则不能通过request.getRemoteAddr()获取IP地址
     * 如果使用了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP地址，X-Forwarded-For中第一个非unknown的有效IP字符串，则为真实IP地址
     */
    public static String getIpAddr(HttpServletRequest request) {
        String ip = null;
        try {
            ip = request.getHeader("x-forwarded-for");
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_CLIENT_IP");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
            }
        } catch (Exception e) {
            logger.error("IPUtils ERROR ", e);
        }

//        //使用代理，则获取第一个IP地址
//        if(StringUtils.isEmpty(ip) && ip.length() > 15) {
//			if(ip.indexOf(",") > 0) {
//				ip = ip.substring(0, ip.indexOf(","));
//			}
//		}

        return ip;
    }

    /**
     * 获取本地域名地址
     *
     * @return
     * @throws UnknownHostException
     */
    public static String getLocalDomain() throws UnknownHostException {
        String ip = InetAddress.getLocalHost().getHostAddress();

        if (ObjectConvertUtils.isEmpty(domain)) {
            String url = "http://" + ip + ":" + port;
            logger.info("==== 获取服务器IP地址为[" + url + "] ====");
            return url;
        }

        String url = "http://" + domain;
        logger.info("==== 获取domain[" + url + "] ====");
        return url;
    }
}
